Chunky Aroid Soil Mix Builder
Start from the site's practical 40/30/20/10 mix, then make a small adjustment for how quickly your environment and pot dry. The goal is an airy root zone with enough moisture retention for your conditions.
Describe your setup
Bark
Perlite / pumice
Sphagnum / coco
Potting mix / castings
This builder creates a starting mix, not a watering schedule. Pot size, root mass, light, airflow and local ingredients change drying speed. Adjust from observed root-zone behavior rather than changing several variables at once.